of london



Nov. 2 1926.

www W R. Edwardw fwd Patented Nov. 2, 1926.

UNITED STATES Pfrlarrr OFFICE.

WILLIAMEOWLAND EDWARDS, OE LONDON, ENGLAND, AssIGN OE To ROWLAND ED- wARDs AND COMPANY, LIMITED, OE LONDON, ENGLAND, A BRITISH COMPANY.

BOX OR CONTAINER FOR ELECTRICAL .ACCUMULATORS.

Application led April 3, 1925, Serial No.

This invention has for its object to provide an improved non-spilling box or container for electrical accumulators, the improved construction being of the type wherein the box or container is fitted with non-spilling and venting devices consisting of chambers provided with baffle plates adapted to prevent the escape of -acid should the box be upset.

According to the present invention I fit across the top of the accumulator box, above or beneath the cover thereof, a venting chamber orcase provided with a number of superposed oppositely inclined bathe or drainage plates having a passage way at their lowest ends, the inlet from the 'accumulator being located beneath the lowermost baffle or drainage plate at its highest end and the outlet arranged above the up-` permost baiiie or drainage plate preferably towards its highest end.

If desired a second venting chamber or case with baiiies arranged on the same principle may be fitted at right angles to the first one.

VVheI-e only one venting chamber is employed, and to prevent the accumulatorbox from lying on its ends, the said ends may 'be rounded or fitted with suitable projections.

By the improved venting device the acid isvprevented from escaping when the box is upset and also the escape of wet acid fumes is prevented as the moisture is extracted from the vapour by contact with the bafiie or drainage plates before it reaches the vent.

'Ihe accompanying drawings illustrate some constructions carried outin. accordance with the present invention.

Figs. l and 2 are respectively longitudinal and transverse sections through the top of an accumulator box made in laccordance with the present invention.

Figs. 3 and 4 are sectional views of the accumulator box showing the approximate position of the liquid contents when the accumulator box is laid on itsvside and end respectively.

lFig. 5 is a similar viewto Fig. 2 showing one way of fitting the invention to an existing accumulator box.

In the construction shown in Figs. 1 to 4, I fit across the top .of the cover a" of the zassaand In Great Ernani M'ay 22, 1924.

may be made open and then attached to the cover a over a venting aperture or hole d therein. f

In the said venting chambers or cases o and c I arrange a number of superposed drainage plates, say two, for example, as shown in case b the first and lowest drainage plate Z2 is inclined downwardly and extends nearly to the end of the case leaving a small space or passage way between it and the end of the case.

The vent opening. d from the box a is located under the centre of the first and lower drain-age plate o.

The next drainage plate b2 is arranged with its higher' end above and near the openiigtor passage way e in the lower drainage p a e The top of the venting chamber or case ZJ vis covered in and provided with a small vent hole g` for the eventual escape of gas .orl

vapour. v

In the case c the bottom c of' the case is 02 1s an intermediate inclined drainage plate leading from beyond the opening d into the base o' down to an openin` k above the uppermost end ofthe inclined ase 0'..

.In the construction shown apart from the" superposed drainage plates in the respective venting chamber or cases c and b, the said i chambers are only connectedlby the intermediate passage d in the top of the box.

In usethe acid fumes passing from the accumulator box into the venting chamber will impinge on the bottoms of the respective drainage plates and any moisture collected will run downwards and through the 'respective connecting openings and finally will run off the lower end of the inclined -base cV back into the box, the tongue facilitating this o eration.

The acid urnes partly freed from moisture by contact with the drainage surfaces of the lower venting chamber c will passthrough the hole d into the upper venting chamber b where the drainage plates b b2 will ensure the further removal of any condensed moisture which will run back through the hole d. The acid fumes will inally escape practically free from moisture through the outer vent g in the top of the outer venting case b.

In this wayl the accumulation of acid or moisture on t e top of the accumulator as is commonly the case will be avoided.

It will also be seen that as the venting chambers and drainage plates extend across or nearly across the width and length of the box by reason of the two venting chambers b and c being laced at right angles the one to the other, tliese drainage plates will not allow the acid to escape if the box is laid upon its side or'end as the acid will not reach to the then highest edge of the drainage plates.

This will-be seen more clearly by reference to Figs. 3 and 4, which show that when the box is laid upon its side or end the liquid contents only penetrate artly into the chamber c owing to the ten ency to the creation of a partial vacuum in the space above the acid end b the fact that the entry of air is prevented y the construction and arrangement of the venting chambers and the drainage plates therein.

As shown in Fig. 5 the improved Venting chambers b and c may be applied to an existing accumulator by making the said ventin chambers -b and c as separate units an mounting them one in the inside and the other on the outside of the cover a of the accumulator box which will be removed for the purpose.

The said venting chambers b and 0 will be connected b a short tube Z, a suitable washer m being interposed if required. The separate venting chambers may be secured in place by solvent or in any suitable manner. r

What I claim as my invention and desire to secure by Letters Patent is 1. In accumulator boxes of the type referred to a venting device consisting of two communicating chambers provided with zigzag venting and drainage channels, the said chambers being arranged at right angles to ane another at the top of the accumulator 2. In accumulator boxes of the type referred to a venting device consisting of a chamber provided with zigzag venting and drainage channels, the base of the said venting chamber which opens into the accumulator box being inclined downwardly and fitted at its lower end with an projecting ongue touching the side of the accumulator 3,7 In an accumulator box of the type referred to a venting device consisting of at least one chamber provided. with zigzag venting and drainage channels, the base of said Venting device which opens into the accumulator box being inclined downwardly and fitted at its lower end with a projecting tongue touching the side of the accumulator box. i

4f. For accumulator boxes a venting device consisting of zigzag venting and drainage channels, the drainage surfaces of which are sloped downwardly, the portion of the said channels next the -inlet being arranged at right angles to the portion next the outlet.

WILLIAM ROVVLAND EDIVARDS. 

